body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}
main {
  flex: 1 0 auto;
}
.modern-navbar {
  background: rgba(255, 255, 255, 0.95) !important;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
  position: sticky;
  top: 0;
  z-index: 1030;
}
.modern-navbar.scrolled {
  background: rgba(255, 255, 255, 0.98) !important;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}
.navbar-brand {
  transition: all 0.3s ease;
  padding: 0.5rem 1rem;
  border-radius: 12px;
}
.navbar-brand:hover {
  transform: scale(1.05);
  background: rgba(13, 110, 253, 0.1);
}
.navbar-brand img {
  transition: all 0.3s ease;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}
.nav-link {
  color: #495057 !important;
  font-weight: 500;
  padding: 0.75rem 1.25rem !important;
  margin: 0 0.25rem;
  border-radius: 25px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.nav-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(13, 110, 253, 0.1), transparent);
  transition: left 0.5s ease;
}
.nav-link:hover::before {
  left: 100%;
}
.nav-link:hover {
  color: #0d6efd !important;
  background: rgba(13, 110, 253, 0.1);
  transform: translateY(-2px);
}
.nav-link.active {
  color: #fff !important;
  background: linear-gradient(135deg, #0d6efd, #6610f2);
  box-shadow: 0 4px 15px rgba(13, 110, 253, 0.3);
}
.nav-link.active:hover {
  background: linear-gradient(135deg, #0b5ed7, #520dc2);
  transform: translateY(-2px);
}
.user-avatar {
  position: relative;
  transition: all 0.3s ease;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid transparent;
  background: linear-gradient(135deg, #0d6efd, #6610f2);
  padding: 3px;
}
.user-avatar:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 25px rgba(13, 110, 253, 0.3);
}
.user-avatar img {
  border-radius: 50%;
  transition: all 0.3s ease;
}
.user-avatar::after {
  content: '';
  position: absolute;
  top: -2px;
  right: -2px;
  width: 12px;
  height: 12px;
  background: #28a745;
  border: 2px solid white;
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.2); opacity: 0.7; }
  100% { transform: scale(1); opacity: 1; }
}
.modern-btn {
  padding: 0.5rem 1.5rem;
  border-radius: 25px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: all 0.3s ease;
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
}
.modern-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s ease;
}
.modern-btn:hover::before {
  left: 100%;
}
.btn-outline-primary.modern-btn {
  color: #0d6efd;
  border-color: #0d6efd;
  background: transparent;
}
.btn-outline-primary.modern-btn:hover {
  background: linear-gradient(135deg, #0d6efd, #6610f2);
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(13, 110, 253, 0.3);
}
.btn-primary.modern-btn {
  background: linear-gradient(135deg, #0d6efd, #6610f2);
  border: none;
}
.btn-primary.modern-btn:hover {
  background: linear-gradient(135deg, #0b5ed7, #520dc2);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(13, 110, 253, 0.4);
}
.navbar-toggler {
  border: none;
  padding: 0.5rem;
  border-radius: 8px;
  transition: all 0.3s ease;
}
.navbar-toggler:hover {
  background: rgba(13, 110, 253, 0.1);
  transform: scale(1.05);
}
.navbar-toggler:focus {
  box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}
.navbar-nav {
  animation: slideInDown 0.6s ease-out;
}
.nav-item {
  animation: fadeInUp 0.6s ease-out;
}
.nav-item:nth-child(1) { animation-delay: 0.1s; }
.nav-item:nth-child(2) { animation-delay: 0.2s; }
.nav-item:nth-child(3) { animation-delay: 0.3s; }
.nav-item:nth-child(4) { animation-delay: 0.4s; }
.nav-item:nth-child(5) { animation-delay: 0.5s; }
@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@media (max-width: 991.98px) {
  .modern-navbar {
    padding: 1rem 0;
  }
  .navbar-collapse {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border-radius: 15px;
    margin-top: 1rem;
    padding: 1rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  }
  .nav-link {
    margin: 0.25rem 0;
    text-align: center;
  }
  .user-avatar {
    margin: 1rem auto;
    display: block;
    width: fit-content;
  }
  .modern-btn {
    width: 100%;
    margin: 0.25rem 0;
  }
}
.navbar-brand img:hover {
  transform: rotate(5deg) scale(1.05);
}
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 6px;
  height: 6px;
  background: #fff;
  border-radius: 50%;
  animation: bounce 1s infinite;
}
@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-5px); }
  60% { transform: translateX(-50%) translateY(-3px); }
}
.ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.6);
  transform: scale(0);
  animation: ripple-animation 0.6s linear;
  pointer-events: none;
}
@keyframes ripple-animation {
  to {
    transform: scale(4);
    opacity: 0;
  }
}
.dropdown-menu {
  animation: slideDown 0.3s ease-out;
  border: none;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
}
.dropdown-item {
  transition: all 0.3s ease;
  border-radius: 8px;
  margin: 2px 8px;
}
.dropdown-item:hover {
  background: linear-gradient(135deg, rgba(13, 110, 253, 0.1), rgba(102, 16, 242, 0.1));
  transform: translateX(5px);
}
@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}


.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.6);
    transform: scale(0);
    animation: ripple-animation 0.6s linear;
    pointer-events: none;
}

@keyframes ripple-animation {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* Mejoras en el dropdown */
.dropdown-menu {
    animation: slideDown 0.3s ease-out;
    border: none;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
}

.dropdown-item {
    transition: all 0.3s ease;
    border-radius: 8px;
    margin: 2px 8px;
}

.dropdown-item:hover {
    background: linear-gradient(135deg, rgba(13, 110, 253, 0.1), rgba(102, 16, 242, 0.1));
    transform: translateX(5px);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}